concept subs
01-27-2006, 02:34 PM
#23
Guest
Posts: n/a
2 things: One I am aware of what a "sixth order" and "eighth order" box are. I was being sarcastic at the enthusiastic description.
Two - I use 12volt.com for reference here and there but the first paragraph of that link is laughable.
Good luck on the project.
Two - I use 12volt.com for reference here and there but the first paragraph of that link is laughable.
Good luck on the project.
02-01-2006, 01:22 PM
#30
Originally posted by hofulstrof:
what is an 8th order bandpass?
the first pic is a mass-loaded 1/8th wave 8th order bandpass designed for a 5" speaker they are large enclosures that one is 1.75 cf.
what makes them so good :
Quote
This alignment allows for establishing three distinct ripple points which can be apart for a response considerably flatter than that of a 4th or 6th. The response plot of both the 4th and 6th order is characterized by a pair of ripples with a dip in between them which can become considerable if the ripples are far enough apart. With 8th order, this dip can be "filled" by the proper alignment of the center ripple, in turn, creating two considerably smaller dips. The ripples can also be effectively aligned for a considerably narrower spectrup with response curve control more accurate than that of lower band pass orders resulting the alignment’s ability to concentrate the output on a very steep, very narrow range which translates to superior efficiency. Much like with 6th order, an 8th order band pass can resemble somewhat poor power handling as both the forward and back-waves are provided an escape pathway, hence, high-powered SPL applications warrant the use of drivers with tight suspension.
what is an 8th order bandpass?
the first pic is a mass-loaded 1/8th wave 8th order bandpass designed for a 5" speaker they are large enclosures that one is 1.75 cf.
what makes them so good :
Quote
This alignment allows for establishing three distinct ripple points which can be apart for a response considerably flatter than that of a 4th or 6th. The response plot of both the 4th and 6th order is characterized by a pair of ripples with a dip in between them which can become considerable if the ripples are far enough apart. With 8th order, this dip can be "filled" by the proper alignment of the center ripple, in turn, creating two considerably smaller dips. The ripples can also be effectively aligned for a considerably narrower spectrup with response curve control more accurate than that of lower band pass orders resulting the alignment’s ability to concentrate the output on a very steep, very narrow range which translates to superior efficiency. Much like with 6th order, an 8th order band pass can resemble somewhat poor power handling as both the forward and back-waves are provided an escape pathway, hence, high-powered SPL applications warrant the use of drivers with tight suspension.
where can i find out how to make this box?
[img]graemlins/dunno.gif[/img] [img]graemlins/thumb.gif[/img] [img]graemlins/dunno.gif[/img]
